(I'm at a conference, & haven't read the entire email..)
[...]
My first question is simply, does anyone else have this working
successfully in F19? And if so, what steps did you need to follow?
I have it working just fine.
Can you try this?
http://kashyapc.fedorapeople.org/virt/configuring-bridging-f19+.txt
[...]
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/kashyap